Closure shell



FIG. 1 is a perspective view of a closure shell in accordance with of the present disclosure.

FIG. 2 is a top plan view of the closure shell in FIG. 1, the bottom of the closure shell forming no part of the claimed design; and,

FIG. 3 is a front elevational view of the closure shell in FIGS. 1 and 2, the opposing rear elevational view and the two side elevational views being identical to FIG. 3. 

I claim the ornamental design for a closure shell, as shown and described. 